Cylinder-operating device for printing-presses.



G. P. FENNER. DECD.

A. C. S. FENNER. EXECUTRIX.

CYLINDER OPERATING DEVICE FOR PRINTING PRESSES.

APPLICATION FILED MAY 9,19!- 1,289,717 Patented Dec. 31, 191&

4 SHEETSSHEET I.

6. PL FENNER. DECD.

A. C. s. FENNER. EXECUTRIX. CYLINDER OPERATING DEVICE FOR PRINTING PRESSES.

APPLICATION mzo MAY 9. 19m. 1,289,717. Patented Dec. 31, 1918. 4 SHEETS SHEET 2.

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G. P. FENNER. DEC'D. A. C. S. FENNER. EXECUTRIX. CYLINDER OPERATING DEVICE FOR PRINTING masses.

Patented D60. 31. 1918.

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vMPLKJATION FILED MAY 9, I918.

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G. P. FENNER. DECD. A. C. S. FENNER. EXECUTRIX. CYLINDER OPERATING DEVICE FOR PRiNTING PRESSES.

' atented Dec. 31, 1918.

APPLICATION FILED MAY 9. "H8.

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anion.

GEORGE P. FENNER, DECEASED, LATE 035 NEW LONDON, CONNECTICUT, BY ANNIE C. S.

FENNER, EXECUTRIX, OF NEW LONDON, CONNECTICUT, ASSIGNOR TO THE BABCOCK PRINTING PRESS MANUFACTURING COMPANY, A CORPORATION .OF CONNECTICUT CYLINDER-OPERATING nnvrcn roe rnmrme-rnn'ssns,

To' all whom it may concern. v 7

Be it known that Gnomes RFENNER, deceased,late a citizen ofthe United States, and a resident of New London, in the county of New London and State of Connecticut, invented certain new and useful Improvements in Cylinder-Operating Devices for Printing-Presses, of which the following is a specification. v

The present invention consists of a cylinder tripping device for printing presses. It

relates to the-class of cylinder tripping de-' vices used for tw) revolution presses or pressesof the type wherein the cylinder makes two revolutions for each printing op-' eration or for each sheet fed. In such presses it is necessary to elevate the impression cylinder at each alternate revolution in orderto separate the cylinder from the form while the bed is making thereturn stroke. This is the periodical or automatic operation which takes place while the press is running and so long as the sheets are properly fed. It is necessary, also, to provide manually controlled means for tripping the cylinder when a sheet fails to feed properly or for anyother reason, so that the cylinder will remain raised during the forward stroke of the bed. There are many devices for thus elevating the cylinder in some of which, only the cylinder is moved upwardly and not-the intermediate gear through which the cylin; der is operated. In such presses there is more or less loosenes's. between the cylinder gear-and the intermediate gear while the cylinder is raised, which causes noise and vibration. In other cases, the intermediate gear is raised with the cylinder sothat the former is always in full mesh with the cylinder gear, even while the cylinder is raised.

The present invention relates to devices of this latter class.

The object hereinis to. raise the cylinder and the intermediate gear automatically or periodically at each alternate revolution of the press and to provide manually controlled means for tripping the press so that the cylinder may be heldup in the event that the feeder fails to feed a sheet, offer any other reason. lVhere the intermediate gear is Iaisedwith the cylinder it has a certain limited planetary movement around the driving inion onthe main shaft, and by. which pinan the intermediate and. cylinder are'driven,

Specification of Letters Patent. Patented Dec, 31,1918, f Application filed llltay 9, 1918. Serial No. 233,573. I I A and this planetary movement causes the cylinderto be retarded or advanced, slightly, in its rotation according to whether the intermediate gear is moving up or down. There up while the bed is making its forward stroke and if the intermediate gear is also tripped, then the relation of the cylinder to the bed is-altered and the cylinder, when it is tripped will-not register w th the bed the same as when untripped. Where a register rack is provided on the bed, for cooperating with a gear segment on the cylinder there may be injury to the register rack or'segment, or both. The present invention is in-' tended toprevent this. During the return ofthe cylinder in the untripping operation it bears the same relation to the bed that it did before itwas tripped. The planetary motion of the intermediate gear and its eflect onthe cylinder are the same at all times. Other advantages will be pointed out in the detailed'description hereinafter.

Figure 1 is a side elevation of a flat bed, two revolution press, showing only such parts as are necessary to an understanding of the presentinvention.

Fig. .2 is an end elevation thereof.

Fig. 3 is an elevation of parts. of the present mechanism, showing the cylinder at the completion of the printing stroke and show ing the bed in its forward position.

Fig. 4 is a similar view but with the cylinstroke. the manually controlled trippingdevice being'out' of'oper'ation. The side frames of the-pressare partly shown at'1an'dthe particular form of these frames has no par- .ticularfibearing onthe present mechan1s1n.-

The impression cylinder 3 is adapted to take the sheets from the feed board 1Tbv means of bed 5. I The bed reciprocates hack and forth,

in a horizontal line, the mechanism for reciprocating the bed not being shown herein because the. present invention requires no modificationflofthe bed driving mechanism. 14kt 16.;is shown a shaft which carries the drive pinion 7 from which the power fer; revolving-theimpression.Cylinderistaken, The

pinion 7 mesheswith'and turns the intermediate gear 8'imountedon theshaft .9. and the intermediate gear in turn' meshes with the gear 10 on the-cylinder shaft'll. Thus, the operating power for -revolving the cyliir der is transmittedfrom the shaft 161. through the pinion 7 the intermediate 8 and the cylinder gear 10; AS is well understood in the art, intwo revolution presses the cylinderzmakes a complete revolution while .the bed 5'. is going forward on the printing stroke and anotherrevolution while the bed is. going backward on the return stroke. When the'bed is going forward except when the'manual trip is operated)the cylinder down but. while thebed .is makingitsjre tiirn stroke the cylinder v is raised so that the sheet-or cylinder willfbe out .of'lcontact with the form onthe bed. f

- Inthe: form of the invention illustrated herein, many of the partsaof-the..a-utomatic r aisi-ngand lowering device are'utilizedas part of the manually controlledtripping device; Itwill be convenient to firstconsider the mechanism as performing-the. usual, or

automatic raisingand lowering operations. There isa shaft 12 which is driven from the shaft 6"bv means of asmallgear 13 on the latter and a larger, gear Hon the shaft 12.

Thetshaft 12 has fixed thereto a cam 15which operates on therollers 16 disposed. at opposlte s des of the cam, to reciprocatea hook bar 17 which carries these tworollers 16,"

' This is one known method of operating a hook bar and it is understood in; the artv Thehook bar 17 toward its forward end has a hook18 in front of which thereis a recess 19" to receive themeniber 20'. Them 'mber 20 1s carried upon ,arocker 21 which is j ournaled". in the side frames 1 and extends across the press and serves in the nature of a shaft. 011' the side ofthe press the rocker 21 has fixed to it an arm 22 to which there is fulcrumed one end of 'a link' or pitinan 23.

- The otherend Qfthe pitman 23is-fulcrumed to an arm 24 which is .part'ofa.well'lmown q ntrge dYl e 25. The, purpose .1 of, the. r qqeetr q idsieeei e ngeeteaoetha silliness the intermediate gear.

shaft 11' toraise and'l'ower the'cylinder and 7 as -eccentric devices for this purpose are well known in the art'a detaileddescription there of is unnecessary in the present-case. It 1s to bewunderstood that the-presentcase is not necessarily limited to an eccentric device for raising vand"loweringeither the cylinder or a IthWlll be apparent from the above-that so long as. the hook bar 17 is hooked .to the member 20"the rocker 21 will be caused to oscillate as the hookbar, reciprocates under the action ofzthe j cam 15; and th'eosci'llashown extending through-sockets; in the rocker 21.., Through the link 26fandiarin 29 the hook bar: oscillates. tl lishaft; 3( At the side def press there is, an arm v 81 fixed .to theshaftE BO and to this. arm there is fulcrurned at 32 coupling '33. The ,..pitnian 34:

hassoneend passed through a bearing, 35,..ih the coupling 33andupper and lowernuts 36 3Tthreadedon the pitm'an'34'engage the bearing 35 between them andthus secure the lower. endl,o'f "the pitman to the. coupling'so that Whenlthe' arm oscillates with. the shaft'SOthe ,pitinan will rise andifall..'.=,1 The upper end voff'the pitman is fulcrumed to an arm. 38 which .operates an eccentric device 39. The eccentricdevice, 39 operates on the. shaft 9 to "raise andlower the intermediate gear.

The eccentric device .39, performs .theasame function asto the intermediate gearthat the eccentric 25 does to. the cylinder; The present. invention is adapted to. beused regardless of whether or not aregister rack is employed on theibed, but aregister rackisshown herein.v a

if The rack 40 is attached to .the forward end ot the bed .5'and' it is, "adapted. to register I with the. toothed'segment 41 on the. cylinder at the commencementonly of the for- Waid printing stroke of thebed. The purposeof the register 'rackiswell known so that further description is unnecessary here.

- Theloperation of the above parts may, be considered at this point.

presstoberunning with the tripping device outfof operation, the andt-he cylinder 3 Twill. be; about inthe position. shown iii-Fig.

Assumin g t the 1 lfla'tthe'commencement.o f the. forwarder I printing stroke .The member 20 will be en: 'aged in the recess 19Qofthe .hook bar 17. The registerrack 40 will be in mesh with the gear segment 41.0f the. cylinder. Both the cylinder and intermediate gear are in their lower position. so that the intermediate gear is in. full.1nesh with the-driving pinion 7. eedaw hrths qrlie ee se l-- Qbviously the pitman '23 and pitinan'34 will be in their lower positions. As the parts proceed from this condition the bed will go forward or to the left in Fig. 1, the cylinder 3 revolving accordingly, and the gear; segment 41 and the register rack 40 i! will disengage .soon after the forward stroke commences. The bed 5 will go forward to its extreme posi tion, the sheet being printed'during the forward motion of the bed, and the bed will then reverse and move back to its extreme rearward position. When the bed reverses and begins itsfrearward motion the hook bar 17 also reverses and .it moves forwardly. This action ofthe hook bar oscillates the rocker 21 and the shaft and both pitmen are moved upwardly and they causc'the intermediate gear and the cylinder to rise until the cylinder is free of the bed, so that the latter maymake itsreturn stroke. The gear segment 41 011 the cylinder will not mesh with the register rack 40 during this return motion of the ,bed as they move slightly in advance of each other.

'VVhen the intermediate gear is lifted in the manner described it partakes of a slight planetary motion in relation to the driving pinion 7 and this slightlyalters the relation of the cylinder and bed, but this is immaterial because'the bed is on its return stroke.

The purpose'of raising the intermediate gear with the cylinder is, as previously pointed out, to keep the intermediate gear in full mesh with the cylinder gear when the cylinder israised to prevent the noise and vibration which would result if these gears were not maintained in full mesh.

Bythe time the bed reverses and commences its second forward motion the hook bar 17 will have been moved backward again and the cylinder-and the intermediate gear will have been lowered again to the position shown in Fig. 1. When-'these'are lowered the intermediate"'gearpartakes of a sl ght planetary motion about the driving pinion 7 but this time the planetary motion is a reversal of it planetary motion when the intermediate gear was raised. This second or return planetary motion brings the cylinder to register with the bed so that the register rack 40 will properly mesh with the gear segment 41 for the second forward or printing stroke.

There is shown a treadle 42 for manually controlling the tripping of the cylinder in order that the latter may be held up while the bed is moving forward. This treadle is fulcrumed to a lever 43 which is pivoted to a bracket at 44. The other end of this lever has a roller 45 engaging the inclined surface 46 of the hook bar 17. The treadle is held up by a spring 47 fastened at one end to the lever 43 and having its other end fixed and when the treadle is up the hook bar remains down so that the member 20 is engaged in the recess 19 of the hook bar. That is to say, so long as the treadle remains up the parts operate as above described. When the press feeder desires to trip the cylinder he presses down 'on the treadle, holding it down as long as he desires the cylinder to be tripped orhe may swing the treadle and lock the pin48' under the stop 49 and the treadle will then remain down until released. q g i When the treadle is pressed down, the lever 43 is rocked in opposition to the spring 47. The arm of the lever 43 which carries the roller 45 will lift the forward end of the hook bar 17 and disengage this bar from the member 20. If the treadle is depressed while the hook bar is in its rearmost position the member 20 .will be disengaged from the recess 19 buttheprojection 18 will carry the member 20 forward again and leave it in this position, with the cylinder raised, until the latter is untripped. While the hook bar 17 is disengaged. from the member 20 the former continues to'move back and forth but since it no longerengages the member -20 the cylinder ceases to rise and fall, remaining in its raised position. iThe cylinder, however, continues to revolve. VVhilethe treadle is depressed there is no change in the operation of the intermediate gear. That is to say, the connection between the hook bar 17 and the shaft 30 remains unchanged, so that as the hook bar reciprocates, the link 26 transmits motion to the arm '29 and the shaft 30 and the intermediate gear is raised and lowered at each alternate revolution of the press the same as if the cylinder were not tripped. It will be understood that the rise and fall of the intermediate is not sufficient to disengage the intermediate gear from thecylinder gear but these will naturally not be'in full'mes'h while the'intermediate gearis down, and the cylinder is upbut in the pres ent case this only happens when the press is tripped. So long as the treadle remains down. the parts will continue to operate as just described.

- When the treadle is released the lever 43 will be rocked back by the spring 47 and this will allow the forward end of the hook bar to descend until the member 20 reengages in therecess 19. Upon this reengagement the device which raises and lowers the cylinder will again be set into operation the same as before the cylinder was tripped.

It will be obvious that while the cylinder remains tripped the intermediate rises and falls as before and it has the slight planetary movement about the driving pinion 7 previously referred to.

The planetary motion will momentarily retard and advance the cylinder slightly the same as before the cylinder was tripped and it follows that if the segment ,41 and register intermediate gear interposed between said ing means, and means for disengaging said pinion and cylinder gear, oscillating means hook bar from said first oscillating means. 10 for raising and lowering the cylinder, oscil- Signed at New London, in the county of lating means for raising and lowering said NeW'London and State of Connecticut, this intermediate gear, a reciprocating hook bar 6th day of May 1918.

adapted to engage and disengage said first oscillating means, a pivoted connection be- ANNIE C. S. F ENNER,

tween said hook bar and said second oscillat- E mecutm'a; of George P. F emzer, deceased.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0. 

